Card-saving device for dobby looms



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CARD SAVING DEVICE FOR DOBBY LOOMS Filed Oct. (51., 1924 2 Sheets-Sheet1 BEDBDUUUIJDUUDHBUHUBUDDDBUDUUDDDU I Owen far.-

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F. VOLECH,

CARD SAVING DEVICE FOR DOBBY LOOMS Filed Oct. 31, 1924 2 Sheets-Sheet 2en/0r.-

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Patented Dec. 1, 1925 l,53,54ti

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FRA'NTIEK VOLECH, 0F VBCHLABI. CZECHOSLOVAKIA.

GARD-SAVING DEVICE FOR BOBBY LOOMS.

Application filed October 31, 19245.

To all whom it may concern Be it known that I, FRANTIEK. Venison,residing at Vrchlabi, Czechoslovakia, have invented certain new anduseful Improvements in Card-Saving Devices for Debby Looms, of which thefollowing is a specification.

This invention relates to a card or lag saving device for the change-boxmotion of dobby looms and consists, in the combination with a. patterncylinder, of a roller having a helical row of lugs arranged so as toenter successively into engagement with push bars which are selected andpositioned by the cylinder and which, when actuated by the lugs,transmit their motion to the change box mechanism. Thus each card or lagwill be able to control the weft supply for as many picks as there arelugs on the roller, and a corresponding number of cards will be saved.

Fig. 1 of the accompanying drawings rep resents a front view of thedevice, and

Fig. 2, a side view of the same.

In the construction shown in the drawings there are two lifting bars gwhich move the revolver or dropboX in opposite direc 'tions, each barbeing operated by means of a frame 39. A plurality of push bars 0 areguided in slots in a plate cl and abut against the frames 2) foroperating the lifting bars. Adjacent push bars belong to differentframes. Each push bar has a lug through the medium of which it receivesmotion from one of a series of lugs 7" connected to a roller a. The pushbars are normally supported so as to be out of reach of the lugs f andare raised into position of co-operation therewith by the patterncylinder Z) whose lags c are for this purpose fitted with pegs g inknown manner. Thus the push bars will be selected by the patterncylinder for operation by the roller a. The lugs f are ar ranged aboutthe roller a in a helical row so as to pass across the lugs of the pushbar in regular succession. In the present instance each lug f is wideenough to span two push bars, one for each frame 19, so that eitherlifting bar 3 will be operated according to the selection made by thepattern cylinder.

Serial No. 747,069.

There is a ratchet wheel m on the shaft of the roller a, and a pawl 1"cooperates with this wheel for turning the roller intermittently. Thereare as many teeth on the ratchet wheel as there are lugs f on theroller, so that one lug passes across a pair of push bar lugs each timethe roller is operated. A detent pawl n, evhich engages a ratchet wheel2 on the roller shaft, prevents retrograde movement. Both pawls can bedisengaged from their wheels by means of a lever s when a resetting ofthe roller is required. The roller shaft has also a tappet 7a whichcooperates with a spur wheel it connected to the shaft of the cylinder7) for turning the latter for bringing a fresh card or lag intooperation after each complete revolution of the roller a.

The card or lag chain 6 may naturally be as long as desired. The numberof lifting bars 3 may also be varied, the cards or lags e, the lugs f,and the grouping of the push bar's being modified to correspond.

The mechanism is mounted in a frame 15 and connected by means of thelatter to the loom.

I claim:

1. In a card saving device for dobby looms, the combination with apattern cylinder and a change-box mechanism, of a plurality of push barsarranged so as to be selected and positioned by said cylinder, a rollerhaving a helical row of lugs arranged so as to operate selected pushbars in succession when the roller is rotated, and means fortransmitting the motion of said bars to the change-box mechanism.

2.111 a card saving device for dobbv looms, the combination with apattern cylinder and a change-box mechanism, of a plurality of push barsarranged so as to be selected and positioned by said cylinder, a rollerhaving a helical row of lugs arranged so as to operate selected pushbars in succession when the roller is rotated, means for rotating saidroller intermittently so as to bring the lugs successively intooperation, and means for transmitting the movement of the push bars tothe change boX mechanism.

3.111 a card saving device for dobby spur wheel connected to thecylinder shaft, a 10 tappet arranged on the roller shaft so as tocooperate with said spur wheel and move the cylinder once for eachrevolution of the roller, and means for transmitting the movement or thepush bars to the change-box 15 mechanism FRANTISEK VOLEOI-I.

